Install Instructions

16
VII. System Start-up
Figure 14: Pilot Burner Flame, Intermittent Ignition
A. Safe operation and other performance criteria were
met with gas manifold and control assembly provided
on boiler when boiler underwent tests specied in
American National Standard for Gas-Fired Low-
Pressure Steam and Hot Water Boilers, ANSI Z21.13.
B. Check main burners. Rear of burner must be in
vertical slot in rear of burner tray. Front of burner must
be seated on orice.
C. Fill boiler with water to normal water line.
D. Prepare to check operation.
1. Obtain gas heating value (in Btu per cubic foot)
from gas supplier.
2. Adjust limit. Adjust cut-in pressure for 2 psi and
differential for 1 psi.
3. Connect manometer to outlet pressure tap on gas
valve.
4. For natural gas-red boiler, temporarily turn off all
other gas-red appliances.
E. Follow Lighting or Operating Instructions to place
boiler in operation. See Figure 16 for intermittent
ignition (EI).
F. Sequence of Operation is located under wiring
diagram. See Table 8. If boiler equipped with
intermittent ignition fails to operate properly, see Figure
20 for Troubleshooting Guide.
G. Test gas piping and connections between Gas Valve
and Manifold, orices, and pilot tubing while boiler is
operating. Locate leaks using approved combustible
gas detector, soap and water, or similar nonammable
solution. Do not use matches, candles, open ames, or
other ignition source.
H. Check pilot burner ame.
1. Intermittent Ignition (EI). See Figure 14. Pilot
produces three (3) ames. Center ame should be
steady, medium hard blue enveloping 3/8 to ½ inch
of sensing probe.
I. Check main burner ame. See Figure 15. Flame
should have clearly dened inner cone with no yellow
tipping. Orange-yellow streaks should not be confused
with true yellow tipping.
J. Check thermostat operation. Raise and lower
temperature setting to start and stop boiler operation.
K. Check ignition system shutoff.
1. Intermittent Ignition (EI). Disconnect Ignition/
sensor cable from Terminal 9 (Spark). Gas valve
should close and pilot and main burners should
extinguish.
L. Low Water Cutoff.
1. Adjust thermostat to highest setting.
2. With boiler operating, open drain valve and slowly
drain boiler.
CAUTION
Do not drain below gauge glass.
3. Main burners and pilot burner will extinguish when
water level falls below low water cutoff (water
should still be visible in gauge glass). Verify limit,
thermostat or other controls have not shut off boiler.
Figure 15: Main Burner Flame